Mud Crab Community Structure in the Mangrove Area of Sungai Limau Hamlet Batu Ampar Village Kubu Raya Regency

Haris, Haris
Nurdiansyah, Syarif Irwan
Nurrahman, Yusuf Arief

Oseanologia
Vol. 5 No. 2 (2026): Agustus

Mangrove crabs (Scylla spp.) are mangrove biota with high ecological and economic value. This study aimed to analyze the community structure of mangrove crabs in Sungai Limau Hamlet, Batu Ampar Village, Kubu Raya Regency. Data were collected from November to December 2025 using the bycatch method from fishermen’s catches using traps. Sampling was conducted four times at one-week intervals. The analysis included relative abundance, diversity (H'), evenness (E), and dominance (C), as well as temperature and salinity. Three species were identified: S. serrata, S. paramamosain, and S. olivacea. Their relative abundances were 88.03%, 10.62%, and 1.34%, respectively. The diversity index was 0.408 (low), evenness was 0.371 (low), and dominance was 0.786 (high). Water temperature ranged from 27–28°C and salinity from 7–10 ppt, with the community dominated by S. serrata and characterized by low diversity.